When you place you left hand thumb down, then your right hand on top perpendicular. This formation is then placed on top of your penis placing it between both hands and is used to get off.
Dude, Matt just told me about how he's always t-batin to all of his porn sites!
The use of one's penis as a striking weapon. Preferable method is while it is erect. This will make a nice thud noise upon contact with one's face, forehead, cheek, chin, or nose.